Best for: RAG & agent memory

Retrieval engines, vector stores and memory layers. Ranked by AgentPick Score, our 0–100 data score.

Short answer: Our top pick: RAGFlow, because it leads RAG & agent memory on AgentPick Score (95/100) with 92k GitHub stars, a release on 14 Oct 2026 and 889 contributors. Runners-up: Mem0 (90) and MemPalace (90).

Ranking

#1
RAGFlow

RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities t…

★ 92k · released 14 Oct 2026 · 889 contributors · Apache-2.0
95AgentPick Score
#2
Mem0

The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production…

★ 67k · released 25 Sept 2026 · 414 contributors · Apache-2.0
90AgentPick Score
#3
MemPalace

The best-benchmarked open-source AI memory system. And it's free.

★ 60k · released 14 Oct 2026 · 172 contributors · MIT
90AgentPick Score
#4
hindsight

Hindsight: Agent Memory That Learns

★ 50k · released 13 Oct 2026 · 285 contributors · MIT
90AgentPick Score
#5
cognee

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory with small models for fre…

★ 32k · released 13 Oct 2026 · 313 contributors · Apache-2.0
89AgentPick Score
#6
chroma

Search infrastructure for AI

★ 30k · released 14 Oct 2026 · 201 contributors · Apache-2.0
88AgentPick Score
#7
PageIndex

📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

★ 39k · released 12 Oct 2026 · 17 contributors · MIT
85AgentPick Score
#8
EverOS

One portable memory layer for every AI agent: local-first, Markdown-native, user-owned, and self-evolving across apps, tools, and …

★ 13k · released 14 Oct 2026 · 25 contributors · Apache-2.0
81AgentPick Score
#9
TencentDB-Agent-Memory

TencentDB Agent Memory is a team-level memory hub for AI Agents — turning conversations, docs, and code into four reusable memory …

★ 29k · released 13 Oct 2026 · 27 contributors
80AgentPick Score
#10
txtai

💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows

★ 13k · released 6 Oct 2026 · 72 contributors · Apache-2.0
80AgentPick Score
#11
MemOS

Self-evolving memory OS for LLM & AI Agents: ultra-persistent memory, hybrid-retrieval, and cross-task skill reuse, with 35.24% to…

★ 12k · released 23 Sept 2026 · 106 contributors · Apache-2.0
80AgentPick Score
#12
cocoindex

Incremental engine for long horizon agents 🌟 Star if you like it!

★ 12k · released 6 Oct 2026 · 104 contributors · Apache-2.0
80AgentPick Score
#13
honcho

Memory library for building stateful agents

★ 7.6k · released 14 Oct 2026 · 81 contributors · AGPL-3.0
79AgentPick Score
#14
moss

The retrieval layer for production AI systems. Lightning-fast (<10ms) search without vector databases. Built for browser, edge, on…

★ 798 · released 12 Oct 2026 · 42 contributors · BSD-2-Clause
69AgentPick Score

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